Tilting mechanism for hoisting-buckets



(No Model.) i 2 Shefs-Sheet 1-.

LAOHLAN. TILTING MECHANISM FOR HOISTING BUGKETS.

*No. 268.695. Patented Dec. 5. 1882.

WITNESSES: I INVENTOR (No Model.) 2 Sheets-Sheet 2.

' J. M. LAGHLAN.

.TILTING MECHANISM FOR HO-ISTING BUGKBTS.

No. 268,695. Patented Dec. 5. 1882.

FIE-5.4.

WITNESSES:

NITED. STATES PATENT OFFICE.

JOHN M. LACHLAN, OF SAN FRANCISCO, CALIFORNIA.

TlLTlNG MECHANISM FOR HOlSTlNG-BUCKETS.

V SPECIFICATION forming part of Letters Patent No. 268,695, dated December 5, 1882,

Application filed October 30, 1882. (No model.)

To all whom it may concern Be it known that I, JOHN M. LAOHLAN, of San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Tilting Mechanism for Hoisting-Buckets, of which improvements the following is a specification.

My inventionrelates to buckets or skips of theclass employed for loading and unloading coal, grain, and other materials which are usually shipped in bulk; and its object is to enable the bucket to be automatically tipped r tilted at any desired point for the purpose of dumping or discharging its load, thereby dispensing with the services of an attendant for such duty.

To thisend my improvements consist in the combination of a bucket, a bail journaled on i line y y of Fig.

fully set forth.

trunnions thereg exteriorly to its center of gravity, and a locking-lever pivoted to the bail and adapted to engage a stop on the bucket; also, in the combination of a bucket, bail, and locking-lever, as set forth, an elevating rope or chain, and a suspended tripping-cone. The improvements claimed are hereinafter more In the accompanying drawings, Figure l is a side view, partly in section, of a hoistingbucket withtmy improvements applied; Fig. 2, a view of the same, partlyin seotion,as seen from the rear; Fig. 3, a horizontal section on an enlarged scale at theline ma: of Fig.1, illustrating. the relation of the locking-lever and the stop on the bucket; and Fig. 4, a horizontal section through the tripping-cone at the The bucket A, which is, per se, of the ordinary construction, is provided with side trunnions, a, which are so located that their axial line shall be between the centers of gravity of the bucket when loaded and unloaded, respectively, in order that the same may be tilted in one direction by the preponderance of weight of its load, and in the other by the preponderance of its own weight. A bail, B, is journaled at its lower ends to the trunnions a, and is coupled at its upper end by a link, b, to a hook, I), to which the hoisting-chainC is connected. The upper portion of the bail B is either slotted throughout or formed of two separate sections separated by an open space,

being preferable toa single one. The lockinglevers correspond substantially in form with the arms of the bail B, and their upper ends are pressed outwardly by springs d secured to the bail, so as, except when acted on by the tripping-cone, presently to be described, to project laterally beyond the bail. When in such position inward projections d upon their lower ends engage stops or shoulders at upon the bucket A, and thereby prevent the tilting of the bucket. The stops 0. are preferably formedby recessing inclines a on the sides of the bucket, as shown in Fig. 3, said .inclines acting as guides to return the bucket, after being tilted, to proper position relatively to the projections of the locking-levers. A tubular tripping-cone, E, is suspended by hangers e to the jib E of a hoisting-crane, upon which is fitted a pulley, C, over which the hoisting rope or chain C passes to the drum. The diameter of the lower end of the tripping-cone is such as to admit freely the upper end of the bail and the projecting upper ends of the locking-levers, and it is thence inwardly inclined to such diameter at'its throat or narrowest part that the contact thereof with the upper ends of the locking-levers forces the latter inwardly and withdraws the projections of their lower ends from the stops at of the bucket, which being therefore free to swingin the eyes of the bail, is tilted by the preponderance of weight of its load and discharges the same. Upon being returned to position by the opposite preponderance of its own weight the bucket is lowered, and immediately upon being withdrawn from the throat of the trippingcone the springs d force out the upper ends of the locking-levers, and cause the lower projections, d, to re-engage the stops 0. of the bucket, thereby locking the bucket to the bail in readiness to receive another load.

It will be observed that the locking-levers, being located between the sections of the bail, are fully protected against accidental displacement, and the continuous incline of the trippin g-cone insures the proper exertion of its action upon the locking-levers in any position in which they may be presented to it. Upon elevating the bucket to such pointthat the throat of the cone and the locking-levers are brought into contact, the bucket will be automatically dumped in any position into which the jib may' 2. Thecombination,substantiallyassetforth, of a bucket, a bail journaled thereto, alockinglever pivoted to said bail, a stop or shoulder located on the bucket and adapted to engage the locking-lever, a hoisting rope or chain, and a suspended tripping-cone.

JOHN M. LAUHLAN.

Witnesses -HORAOE LEE,

MATHIAS SEDDINGER. 

